Protractor



(ANO Model.)

J. G. MILLER.

PROTRAGTQR. Y 110.418.415. PatentedDeo. 31, 1889.

' 212%@ MM N N. PETERS. Pboln-uthvgraphar, wuhngmn. D C.

UNITED STATES PATENT OFFICE.

JOHN CALVIN MILLER, OF ICKESBURG, PENNSYLVANIA.

PROTRACTO R.

SPECIFICATION forming part of Letters Patent No. 418,415, dated December 31, 1889.

Application filed August 27, 1889. Serial No. 322,134. (No model.)

To all whom t may concern.-

Beit known that I, JOHN CALVIN MILLER, a citizen of the United States, and a resident of Ickesburg, in the county of Perry and State of Pennsylvania, have invented certain new and useful Improvements in Scale-Protractors for Rulers; and I do hereby declare that the' or parallel ruler with my device applied thereto. Fig. 2 represents a plan viewof a single ruler with my device applied, showing in dotted lines the ruler moved to different positions. Fig. 3. represents a perspective view of the device, and Fig. 4' represents a perspective view of a modified form.

The device consists of a segmental or semicircular plate A, having the scale II2 of degrees and havingl the arms B extending therefrom, the plate being provided with a stud or pin C, and the arms being also provided with studs D, by means of which studs the device is supported on the surface.

The ruler is provided with an opening E to receive the stud C, and with marks or pointers F to point to the desired degree on the scale to ascertain the proper slant for the line.

The manner of using the device will be readily understood. The stud on 4the plate engages the opening in the ruler, which is moved to the desired degree ou the scale and the line drawn.

In the modification of the invention the arms are bent down and form supports for the device.

Having th us described my invention, I claim and desire to secure `by Letters Patent of the United States openings E and marks or pointers F, of the segmental plate A, having the scale H2, the stud C, and the arms B B, provided with studs D D, substantially as described.

In testimony that I claim the foregoing as my own I have hereunto aiiXed my signature in presence of two witnesses.

JOHN CALVIN MILLER.

Witnesses:

ABRAHAM SMITH, STANLEY E. WETZEL.

The combination, with theruler having the 

